Introduction -- Systematics of making things smaller, pre-quantum -- What are limits to smallness? -- Quantum nature of the nanoworld -- Quantum consequences for the macroworld -- Self-assembled nanostructures in nature and industry -- Physics-based experimental approaches to nanofabrication and nanotechnology -- Quantum technologies based on magnetism, electron and nuclear spin, and superconductivity -- Silicon nanoelectronics and beyond -- Looking into the future.